Pigeonhole redirect is adding a message-id header when it already exists

[A. Schulze]

Am 02.10.22 um 11:37 schrieb Emmanuel Fusté:
> Le 02/10/2022 à 06:35, Sébastien Riccio a écrit :
>> - What options could we have to resolve this?
>>
>> a) Having dovecot core to remove the Message-ID header line from the mail if it is not going to consider it valid ? (So there is no dupe headers when pigeonhole adds one?)
>> b) Having pigeonhole check, when adding a new valid Message-ID, if there is already one existing, and remove the bogus one ?
> 
> Hello,
> In my opinion, an option c) should be considered.
> Bogus or not, if a Message-ID is present in the header you should not touch it.

I agree. Pigeonhole should not modify content on forwarding.

Andreas